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/******************************************************
Copyright (c) 2011-2013 Percona LLC and/or its affiliates.
Data sink interface.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*******************************************************/
#ifndef XB_DATASINK_H
#define XB_DATASINK_H
#include <my_global.h>
#include <my_dir.h>
#ifdef __cplusplus
extern "C" {
#endif
extern char *xtrabackup_tmpdir;
struct datasink_struct;
typedef struct datasink_struct datasink_t;
typedef struct ds_ctxt {
datasink_t *datasink;
char *root;
void *ptr;
struct ds_ctxt *pipe_ctxt;
/*
Copy file for backup/restore.
@return true in case of success.
*/
bool copy_file(const char *src_file_path,
const char *dst_file_path,
uint thread_n,
bool rewrite = false);
bool move_file(const char *src_file_path,
const char *dst_file_path,
const char *dst_dir,
uint thread_n);
bool make_hardlink(const char *from_path, const char *to_path);
void copy_or_move_dir(const char *from, const char *to,
bool do_copy, bool allow_hardlinks);
bool backup_file_vprintf(const char *filename,
const char *fmt, va_list ap);
bool backup_file_print_buf(const char *filename,
const char *buf,
int buf_len);
bool backup_file_printf(const char *filename,
const char *fmt, ...)
ATTRIBUTE_FORMAT(printf, 2, 0);
} ds_ctxt_t;
typedef struct {
void *ptr;
char *path;
datasink_t *datasink;
} ds_file_t;
struct datasink_struct {
ds_ctxt_t *(*init)(const char *root);
ds_file_t *(*open)(ds_ctxt_t *ctxt, const char *path,
const MY_STAT *stat, bool rewrite);
int (*write)(ds_file_t *file, const unsigned char *buf, size_t len);
int (*seek_set)(ds_file_t *file, my_off_t offset);
int (*close)(ds_file_t *file);
int (*remove)(const char *path);
// TODO: consider to return bool from "rename" and "remove"
int (*rename)(ds_ctxt_t *ctxt, const char *old_path, const char *new_path);
int (*mremove)(ds_ctxt_t *ctxt, const char *path);
void (*deinit)(ds_ctxt_t *ctxt);
};
static inline int dummy_remove(const char *) {
return 0;
}
/* Supported datasink types */
typedef enum {
DS_TYPE_STDOUT,
DS_TYPE_LOCAL,
DS_TYPE_XBSTREAM,
DS_TYPE_COMPRESS,
DS_TYPE_ENCRYPT,
DS_TYPE_DECRYPT,
DS_TYPE_TMPFILE,
DS_TYPE_BUFFER
} ds_type_t;
/************************************************************************
Create a datasink of the specified type */
ds_ctxt_t *ds_create(const char *root, ds_type_t type);
/************************************************************************
Open a datasink file */
ds_file_t *ds_open(
ds_ctxt_t *ctxt, const char *path, const MY_STAT *stat, bool rewrite = false);
/************************************************************************
Write to a datasink file.
@return 0 on success, 1 on error. */
int ds_write(ds_file_t *file, const void *buf, size_t len);
int ds_seek_set(ds_file_t *file, my_off_t offset);
int ds_rename(ds_ctxt_t *ctxt, const char *old_path, const char *new_path);
int ds_remove(ds_ctxt_t *ctxt, const char *path);
/************************************************************************
Close a datasink file.
@return 0 on success, 1, on error. */
int ds_close(ds_file_t *file);
/************************************************************************
Destroy a datasink handle */
void ds_destroy(ds_ctxt_t *ctxt);
/************************************************************************
Set the destination pipe for a datasink (only makes sense for compress and
tmpfile). */
void ds_set_pipe(ds_ctxt_t *ctxt, ds_ctxt_t *pipe_ctxt);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* XB_DATASINK_H */
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